<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
            @click="change(item.name)"
             v-for="item of hot"
            :key="item.id">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
          @click="change(innerItem.name)"
          v-for="innerItem of item" 
          :key="innerItem.id">{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  import { mapState, mapActions } from 'vuex'
  export default {
    name: 'CityList',
    props: {
      cities: Object,
      hot: Array,
      letter: String
    },
    mounted() {
      this.scroll = new Bscroll(this.$refs.wrapper,{
        click: true
      })
    },
    computed:{
      ...mapState({
        currentCity: 'city'
      })
    },
    methods: {
      ...mapActions(['changeCity']),
      change (value){
        this.$router.push('/')
        this.changeCity(value)
      },
      
    },
    watch: {
      letter() {
        if (this.letter) {
          const element = this.$refs[this.letter][0]
          this.scroll.scrollToElement( element )
        }
      }
    }
  }
</script>

<style lang='stylus' scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color :#ccc
    &:after
      border-color :#ccc  
  .border-bottom
    &:before
      border-color :#ccc
  .list
    overflow :hidden
    position :absolute
    top :1.58rem
    left :0
    right :0
    bottom :0
    .title
      line-height .54rem
      background :#eee
      padding-left :.2rem
      color :#666
      font-size :.26rem
    .button-list
      overflow :hidden
      padding .1rem .6rem .1rem .1rem
      .button-wrapper
        float :left
        width :33.33%
        .button
          margin :.1rem
          padding :.01rem 0
          text-align :center
          border : .02rem solid #ccc
          border-radius .06rem
    .item-list
      .item
        line-height :.76rem
        padding-left :.2rem
</style>
